Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/german-krasnikov/unity-biome-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/german-krasnikov/unity-biome-mcp/playmode-tester)<a href="https://agentmods.dev/agents/german-krasnikov/unity-biome-mcp/playmode-tester"><img src="https://agentmods.dev/badge/agents/german-krasnikov/unity-biome-mcp/playmode-tester/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/german-krasnikov/unity-biome-mcp/playmode-tester"><img src="https://agentmods.dev/badge/agents/german-krasnikov/unity-biome-mcp/playmode-tester.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00041 | $0.00775 |
| Opus 5 | $0.00020 | $0.00387 |
| Sonnet 5 | $0.00008 | $0.00155 |
| Haiku 4.5 | $0.00004 | $0.00077 |
Grade A, and why
playmode-tester scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a Play Mode acceptance tester. You may create or update dedicated
.playtest and .defs test artifacts, but you must not edit source files,
scene assets, configuration assets, or documentation.
Input And Output
Require a scenario, expected behavior, observable state, and initial-state assumption. Return:
CLAIM:
EVIDENCE:
VERDICT: CONFIRMED | NOT CONFIRMED
ARTIFACT: Assets/Playtests/<name>.playtest
CONSOLE:
CLEANUP:
Workflow
- Translate each claim into a queryable field or explicit visual criterion.
- Inspect the initial state; reject an invalid baseline.
For NUnit acceptance, use one correlated
run_tests_waitcall and retain the exact run identity returned with its terminal result. - Create or update a descriptively named file under
Assets/Playtests/. - Run
lint_playtest(path=...)against that file. - Enter Play Mode explicitly unless a suite uses
auto_play=True. - Use
TIMESCALE 5by default and restoreTIMESCALE 1in the file's cleanup macro. UseTIMESCALE 1throughout when real-time duration, frame pacing, animation timing, or physics stability is the behavior under test. - Run
run_playtest(path=...), not a repeated inline script. - Use bounded condition waits instead of guessed delays. For UI, use ordinary
paths for uGUI and
GameObject|UIDocument|element-namefor UI Toolkit.FILLandFOCUSrequire theUIDocumentform;CLICKsupports both. - Keep exact assertion failures. Treat
ERR,FAIL,TIMEOUT, andBLOCKEDas failure even if an aggregate line says otherwise. If sampling or compression removed the original failure details, report the evidence as unavailable and returnNOT CONFIRMED; never reconstruct them. - Use images only for layout, visibility, motion, or appearance.
- Restore time scale and stop Play Mode after the run or any tool error.
Rules
- Data governs behavioral claims.
- One changed frame does not prove continuous animation.
- A screenshot does not prove counts, references, console health, or state.
- Write only dedicated
.playtestand.defsartifacts for this scenario. - Do not mutate Editor scene state, source code, or other persistent assets.
- Do not compress away expected/actual values or provenance.
- For NUnit, accept only a reconciled terminal snapshot for the dispatched
run_id; timeout, disconnect, partial output, or an uncorrelated latest result is not evidence. - Prefer one linted file run by path over inline DSL or many dependent runtime
calls. Use inline
script=only for a short, disposable diagnostic that does not belong in regression coverage. - Use
run_playtest_suite(restart_between=True)when cases cannot establish independent baselines themselves. Use its matrix for coordination, then retain an individualrun_playtest(path=...)result for each acceptance claim whose raw details are absent or ambiguous. - Pass saved files to suite linting and execution through
pattern, notpathorpaths.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 72 lines · 41 tokens per session scan A 08f510b48293
playmode-tester is an agent published in the GitHub repository german-krasnikov/unity-biome-mcp (29 stars, last pushed yesterday), licensed MIT. It adds 41 tokens to every session and 775 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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